General Knowledge

Science & Technology

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Sounds of which frequencies are called infrasonic sounds or infrasound?

Below 20 Hz

Above 20 Hz

Below 25 Hz

Above 25 Hz

✅ Correct Option: 1

The audible range for humans is roughly 20 Hz to 20,000 Hz. Frequencies below 20 Hz are infrasonic, while those above 20,000 Hz are ultrasonic.

2023: 24 May Shift 3

Match List - I with List - II.

List - I (Alloys)	List - II (Composition)
(1) Amalgum	(I) Cu + Zn
(2) Brass	(II) Pb + Sn
(3) Bronze	(III) Cu + Sn
(4) Solder	(IV) Metal + Hg

Choose the most appropriate answer from the options given below:

2026: 31 May Shift 1

Arrange the Planets in decreasing order in terms of number of their Satellites :

A. Mars

B. Uranus

C. Jupiter

D. Saturn

Choose the correct answer from the options given below :

2025: 14 May Shift 1

Which among the following non-metal is "monoatomic"?

2026: 29 May Shift 2

Which of the following are plant hormones?

A. Insulin

B. Auxin

C. Thyroxin

D. Cytokinin

Choose the correct answer from the options given below:

2026: 19 May Shift 2

When an object falls through the air, it experiences air resistance which increases with speed. Eventually, the object reaches a point where the air resistance equals the ____________ and no longer accelerates.

Find the correct option-

2026: 12 May Shift 2

Identify the celebrated biologist who is credited as the founding Director of TIFR National Center for Biological Sciences?

Sounds of which frequencies are called infrasonic sounds or infrasound?

Solution

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